Results 31 to 40 of about 21,040 (208)
Zhongshan Daxue xuebao. Yixue kexue ban, 2006 【目的】研究大鼠喉移植供体喉的保存，探讨喉体不同组织结构对缺血和坏死的耐受情况。【方法】40只Wister大鼠，采用UW液灌注，低温保存供体鼠喉，分别通过病理光学及透射电镜观察其形态学改变，比较喉不同组织结构的缺血、坏死变化。【结果】供体喉保存60h后，病理HE染色才能镜检到喉体组织缺血改变，电镜24h即可发现组织细胞的缺血改变，鼠喉各组织结构缺血耐受时间不同，最先出现变化的是粘膜上皮，接着是喉内肌、小涎腺、血管内皮、神经纤维，最后改变的是软骨细胞。【结论】透射电镜检查能及时地反映喉体组织细胞缺血 ...
李浩, 彭汉伟, 曾宗渊, 伍国号
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, 2005 对行为的定义和描述是定量开展行为学研究的前提与基础。通过对人工饲养环境下长江江豚行为的观察、记录和分析,定义和描述了长江江豚近40种行为。在此基础上,初步构建了人工饲养环境下长江江豚行为学研究所必需的行为谱,由活跃的水面行为、玩耍、索食、社群行为、性行为、休息、摩擦、杂类八个类别组成 ...
肖建强,王丁
core
Control of two-phase pitch precursor and microstructure of cross-section of carbon fibers [PDF]
, 2017 为给高性能碳纤维的结构设计提供理论参考,利用各向同性煤沥青(IPc)与中间相沥青形成二元不相容共混物的相分离结构,并利用筛网装置改变共混沥青的熔; 体流动状态,研究共混两相沥青的相结构对最终碳纤维结构的影响。结果表明:在共混前驱体中,掺杂的15%; IPc不足以抑制劈裂的形成;而使用15层筛网纺丝装置,促进微畴沿径向折叠排列,抑制了轴向劈裂的出现;进一步提高熔体受剪切程度,各向同性相形成贯穿; 的条带结构,纤维截面重新出现劈裂结构。30%的各向同性相抵抗了碳纤维中的裂纹扩展 ...
余木火, 刘安华, 姚艳波
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Rare Metals, EarlyView.ABSTRACT Polycrystalline SnSe thin film materials have gained increasing attention as a promising solution for fabricating microscale, flexible, self‐powered electronic components in the field of thermoelectric (TE) materials and devices. However, it is still a great challenge to simultaneously achieve preferred crystal orientation and optimize carrier
Wenxia Li +10 more
wiley +1 more source
, 2005 This is a comprehensive introduction to DCMI (Dublin Core Metadata Initiative), its activities, metadata specifications and future directions. Many topics discussed during the history of DCMI on metadata developing and implementation are still repeated ...
Liu, Wei
core
Conservation Funding at the Local Level 地方层面的保护资金
Wildlife Letters, EarlyView.Direct conservation fund transfer to local communities ensures the involvement of these communities in decision‐making and fund utilisation, which will ultimately lead to effective biodiversity conservation. A Cakchiquel family in the hamlet of Patzutzun, Guatemala, 1993. Credits: John Issac. Source: UNEP‐WCMC Internal Resources.
Jithu K Jose
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2010 目的构建pEGFP-N1/VEGF真核表达质粒,并进行鉴定。方法利用RT-PCR方法从组织中提取VEGF的基因片段,与pMD18-T载体连接,构建pMD18-T/VEGF重组质粒,酶切后与pEGFP-N1真核表达载体连接,构建pEGFP-N1/VEGF真核表达质粒,进行测序、酶切鉴定,表明质粒构建成功。结果本实验成功构建了pEGFP-N1/VEGF真核表达质粒。结论为进一步研究利用VEGF基因修饰骨组织工程骨,促进血管再生提供实验基础。
张明磊 +4 more
doaj
Anatomic and radiograph study of anterior cruciate ligament reconstruction [PDF]
, 2015 目的：1、观察膝关节交叉韧带股骨附着处的解剖形态学特点，并利用PhotoshopCC2014软件测量股骨附着处印迹的实际面积大小；2、研究标准膝关节侧位X线片上前交叉韧带（ACL）股骨止点的相关骨性标志数据，为临床上ACL双束解剖重建提供参考。 方法：对10例成人膝关节标本进行解剖，剔除膝关节标本周围肌肉、关节囊，把髌韧带从股骨端切断，保留髌骨、髌韧带、内外侧副韧带、前后交叉韧带及内外侧半月板，经髁间窝前出口最高点沿矢状面在股骨前面和后面作两条平行股骨纵轴的直线，用手锯沿两直线将股骨分为两部分 ...
甘志勇
core
‘The Heart of the Matter’: Grandparent Childcare in Contemporary Chinese Families
Children &Society, EarlyView.ABSTRACT Grandparent childcare is an international phenomenon, especially within families with children under 3 years old. China is no exception, as shown by a number of quantitative studies. Less clear is our understanding of the actual childcare arrangements involved and how these are negotiated and sustained through the intergenerational ...
Jiatong Ling +2 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2009 目的构建pEGFP-N1/BMP-2真核表达质粒,并进行鉴定。方法利用RT-PCR方法从组织中提取骨形态发生蛋白（BMP-2）的基因片段,与pMD18-T载体连接,构建pMD18-T/BMP-2重组质粒,酶切后与pEGFP-N1真核表达载体连接,构建pEGFP-N1/BMP-2真核表达质粒,进行测序、酶切鉴定,表明质粒构建成功。结果通过测序、酶切鉴定,证明pMD18-T/BMP-2质粒构建成功。结论本实验成功构建了pEGFP-N1/BMP-2真核表达质粒,为进一步研究利用BMP ...
张明磊 +4 more
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